公开(公告)号：US3559497A

公开(公告)日：1971-02-02

申请号：US3559497D

申请日：1968-11-01

Applicant: INT STANDARD ELECTRIC CORP

Inventor： STEENACKERS EMIEL-MARIA ,  EYNDEN PIETER VAN DEN ,  RUELENS REMY FELIX

IPC: G06M1/04 ,  G06M1/10 ,  F16H31/00

CPC classification number: G06M1/044 ,  G06M1/104 ,  Y10T74/1556 ,  Y10T74/214

Abstract: A STEPPING MECHANISM IS PROVIDED USING A ROTATABLE STAR WHEEL FORMED OF PLASTIC AND A FORK-SHAPED PAWL. THE ARMS OF THE PAWL ARE TERMINATED IN TWO SURFACES, ONE OF WHICH HAS ABOUT HALF THE AREA OF A TOTH ON THE STAR WHEEL. THE RELATIVELY SMALL AREA ON THE PAWL IS CHOSEN SO THAT IT CANNOT CAUSE THE STAR WHEEL TO ROTATE IN THE BACKWARD DIRECTION EVEN WHEN IT BECOMES STICKY DUE TO THE PRESENCE OF GREASE ON IT.